Crosslinkable composition based on organosilicon compounds

Abstract

Crosslinkable compositions based on organosilicon compounds contain at least one compound of the formula H(OCH 2 CH 2 ) n (OCHCH 3 CH 2 ) p (OCH 2 CH 2 ) m OH  (III) and/or a reaction product thereof with hydrolyzable organosilicon compound(s), where n is 0 or an integer from 1 to 30, m is 0 or an integer from 1 to 30, and the sum of n and m is greater than 5, and p is 1, 2, or 3. The compositions have superior application properties as compared to similar compositions without compound III.

1. A crosslinkable organosilicon composition comprising at least one compound of the formula
   H(OCH 2 CH 2 ) n (OCHCH 3 CH 2 ) p (OCH 2 CH 2 ) m OH  (III), 
 a reaction product thereof with hydrolyzable organosilicon compound(s), or a mixture thereof, wherein 
 n is 0 or an integer from 1 to 30, 
 m is 0 or an integer from 1 to 30, and 
 the sum of n and m is greater than 5, and 
 p is 1, 2, or 3. 
 
     
     
       2. The crosslinkable composition of  claim 1 , wherein p is equal to 1 or 2. 
     
     
       3. The crosslinkable composition of  claim 1 , wherein p is equal to 1. 
     
     
       4. The crosslinkable composition of  claim 2 , wherein the sum of n and m is from 10 to 15. 
     
     
       5. The crosslinkable composition of  claim 1 , which is a condensation crosslinkable composition. 
     
     
       6. The crosslinkable composition of  claim 2 , which is a condensation crosslinkable composition. 
     
     
       7. The crosslinkable composition of  claim 3 , which is a condensation crosslinkable composition. 
     
     
       8. The crosslinkable composition of  claim 4 , which is a condensation crosslinkable composition. 
     
     
       9. The crosslinkable composition of  claim 1 , comprising
 (A) at least one organosilicon compound having at least two condensable groups, 
 (B) at least one compound of the formula (III), a reaction product thereof with hydrolyzable organosilicon compound(s) or a mixture thereof, and, (C) a crosslinking agent. 
 
     
     
       10. The crosslinkable composition of  claim 8 , which comprises from 0.01 to 5 parts by weight of component (B), based on 100 parts by weight of organosilicon compound (A). 
     
     
       11. The crosslinkable composition of  claim 1 , comprising
 (A) at least one organosilicon compound containing units of the formula (I),
   R a Y b SiO (4-a-b)/2   (I), 
 
 where 
 R are identical or different and are substituted or unsubstituted hydrocarbon radicals optionally interrupted by non-adjacent oxygen atoms, 
 Y are identical or different and are hydroxy radicals or hydrolyzable radicals, 
 a is 0, 1, 2, or 3, and 
 b is 0, 1, 2, or 3,
 with the proviso that the sum of a and b is less than or equal to 4 and at least two Y radicals are present per molecule, and 
 
 (B) at least one compound of the formula (III), a reaction product thereof with hydrolyzable organosilicon compound(s) or a mixture thereof, and 
 (C) a crosslinking agent of the formula (IV),
   Z c SiR 2   (4-c)   (IV), 
 
 wherein 
 R 2  are identical or different monovalent optionally substituted hydrocarbon radicals optionally containing non-adjacent oxygen atoms, 
 Z are identical or different hydrolysable radicals other than hydroxyl radicals, and 
 c is 3 or 4 
 or partial hydrolysates thereof, 
 (D) optionally, a curing accelerator, 
 (E) optionally, a plasticizer, 
 (F) optionally, a filler, and 
 (G) optionally a coupling agent. 
 
     
     
       12. A molding, produced by crosslinking a composition of  claim 1 . 
     
     
       13. A molding, produced by crosslinking a composition of  claim 9 . 
     
     
       14. A molding, produced by crosslinking a composition of  claim 11 .